October 25, 2019 from the Kof-K:
Please be advised that due to improper handling during distribution, bags of Heckers All Purpose flour (5LB) with Best Buy Dates Dec 04 2020 and Dec 05 2020 should be sifted prior to use.
This alert does not apply to other bag codes or in areas outside of New York and New Jersey.
October 18, 2019 - from yudelstake.blogspot.com
Jan, 2020 & December 30th, 2020- Heckers flour bugs found - must be sifted. Flour bugs found in Heckers flour, purchased in a numerous tri-state (NY/NJ) stores dated December 30th 2020. Unknown, how long in stores storage.
October 23, 2018 - from yudelstake.blogspot.com
Flour bugs werefound in Heckers flour, purchased in a numerous tri-state (NY/NJ) stores. Flour is Dated January 2020.
December 19, 2018 - product is still on store shelves
Methods for checking flour from Rabbi Moshe Veye is here.
From spruceeats how to store flour: